Remove redundant code for intrabc RD calculation
Remove redundant code for intrabc RD calculation

Change-Id: I2405656d1151559420b101fc51ceae8a6ba5ca56

GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom